import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login'},
  { path: '/login', component: Login },
  { 
   path: '/home',
   component: Home , 
   redirect: '/welcome',
   children: [
    { path: '/welcome', component: Welcome},
    { path: '/users', component: Users},
    { path: '/rights', component: Rights},
    { path: '/roles', component: Roles}
  ]},
]

const router = new VueRouter({
  routes
})
//挂载路由导航守卫
router.beforeEach((to, from, next)=>{
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  // next()放行 next('/login')强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router
